Mas’ala 37924المبسوطHanafivol. 16, p. 55vol. 16, p. 55 وَلَوْ خَدَمَهَا كَانَ لَهُ الْأَجْرُ عَلَيْهَا، Read the whole chapterCopy with source On the map: Hire and rewardCompare